Friction shock-absorbing mechanism.



J. F. O'CONNOR.

FRICTION SHOCK ABSORBING MECHANISM.

APPLICATION FILED MAR. I2, I9I8- Patented Apr.

INVENTOR. Jhlzf'flfiiziwr By I J- 16 i%% ATTORig will? TED .ATFiFfi JOHN F. OCONNOR, OF CHIGAGQ, ILLINOIS, ASSIGNOR T9 WILLIAM H. MINER, OF

A CHAZY, NEW YORK.

FRICTION SHOGK-ABSGRBING MECHANISM.

Application filed March 12, 1918.

To all who/a it may concern Be it known that I, JoHN F. OCoNNon, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Friction Shock-Ahsorbing Mechanisms, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in friction shock absorbing mechanisms.

One object of the invention is to providea friction shock absorbing mechanism, more particularly adapted for railway draft riggings and wherein the friction shell, wedgeand shoes are so formed as to permit their manufacture commercially in the form of castings, preferably malleable castings, to thereby promote cheapness of the structure.

Another and more specific object of the invention is to provide a friction shock absorbing mechanism, so arranged that its elements which are subjected to the greatest wear are readily replaceable.

In the drawing forming part of this specification, Figure 1 is a part elevational view, part vertical, longitudinal section, of a railway draft rigging showing my improvements in connection therewith. Fig. 2 is a vertical, transverse, sectional view, taken substantially on the line 22 of Fig. 1. Fig. 3 is an inner end elevational view of the wedge. And Fig. 4 is an end view of one of the shoes.

In said drawing, 1010 denote the draft sills of the car to which are secured front and rear stops 11 and 12. The draw bar 13 is operatively connected to the shock absorbing mechanism proper by any suitable means, such as the yoke 14. The shock absorbing mechanism is disposed between front and rear followers,15-15 and all the parts maybe supported by a saddle plate 16.

Theshock absorbing mechanism proper, as shown,.comprises a casting A, a pressuretransmitting member B, a plurality of shoes CC, a series-of friction elementsD-D, a main springE, and a retaining bolt F.

The casting A is of substantially cylindri cal form and combines a friction shell proper 17 at its forward end, a spring casing 18 and. a rear wall 19.

The pressure-transmitting member hears Specification of Letters Patent.

Patented Apr. 29, ltlilljl.

Serial No. 221,932.

against the front follower 15 and on its inner face has an integral wedge 20 preferably formed with three wedge faces 21-21. The wedge faces 21 cooperate with corresponding wedge faces 2222 formed on the shoes CC, there being also three shoes to cor respond to the number of wedge faces 21. The spring E comprises preferably an outer heavy coil and an inner nested coil, said coils hearing at their rear ends against the casting A and at their forward ends against the shoes C.

Around the periphery of the pressure member B and on the inner side thereof,

said member B is provided with a series of radially extending under-cut slots or grooves 23. each of which is adapted to receive the head 24 of a friction element D. The friction elements D will preferably consist of tempered bolt blanks which can be readily obtained. Each of the bolt blanks or friction elements D is extended within the friction shell 17. the latter being provided with a corresponding series of longitudinally extending grooves 25-25 to accommodate the bolt blanks and the outer faces of the shoes C are similarly grooved, as indicated at 2626.

Upon compressive action of the shock absorbing mechanism, it is evident that the friction elements D will move in unison with the pressure member B. As the pressure member B moves inwardly with respect to the shell 17, the shoes C will be forced inwardly and simultaneously radial pressure will be exerted thereagainst due to the cooperation of the wedge faces 21 and 22. The radial. pressure from the shoes C will, of course, increase the friction between the friction elements I) and the shell 17.

With the construction herein described, it is evidentthat the pressure-transmitting element B, the shoes (l and the combined friction shell and spring casing may be. made inthe form of malleable castings and the friction elements D can be readily replaced at small expense. Furthermore, the use of the detachable friction elements D permitsof the use of two .kinds of metal in enerating friction which is one of the desirable features of an efficient friction gear.

I claim:

1. In a friction shock absorbing mecha; nism, the combination witha, friction shell. 0f 2 a plurality of fries. .i' ielements movable in unison with and attached to the wedge all of said elements having direct frictional engagement with the shell, shoes having wedge faces cooperable with said wedge, said shoes co-acting with said elements to force the latter against the shell, and saring means resisting relative movement etween'the shell and shoes.

2. In a friction shock absorbing mechanism, the combination with a friction shell, of a wedge, a pluralityof friction elements movable in unison with the wedge and having frictional engagement with the shell, shoes having wedge faces cooperable with said wedge, said shoes co-aeting with said elements to force the latter against the shell, and spring means resisting relative movement between the shell and shoes, said elements being detaehably connected to said wedge.

33. In a friction shock absorbing mechanism, the combination with a friction shell, of a wedge,.a.plurality of friction elements movable in unisonwith the wedge and having frictional engagement with the shell, shoes having wedge faces cooperable with said wedge, said shoes co-acting with said elementsto force the latter against the shell, and spring .means resisting relative move ment between the shell and shoes, said ele ments comprising a plurality of rod-like extensions from the wedge, the shell and shoes beinggrooved to accommodate said elements.

4. In a shock absorbing mechanism, the combination with a friction shell, ofa pres sure-transmitting member, a series of friction elements movable in unison with said member and slidable within the shell, a

wedge, Wedgeshaped shoes cooper-able with and directly engaging said wedge and adapted to directly engage and force-each of said elements directly against the friction shell, and spring means for resisting relative movement between the shell and shoes.

the pressuretransmitting member, and a series of wedge-shaped shoes co-acting with said avedge and with said friction elements to force the latter against the shell, said spaced friction elements-being disposed circularlyaround the wedge.

6. In a shock absorbing mechanism, the combination with a friction shell, of a pressure-transmitting member having an integrally formed wedge, a plurality of headed, rod-like friction .elements detachably connected with said member and movable in unison therewith, said shell being longitudinally grooved on its inner face to accommodate said elements, a plurality of shoes having wedge faces cooperating with said wedge, said shoes being longitudinally grooved on their outer faces toaccommodate saidielements,andspring means for resisting relative :movement between said shoes and said shell.

In witness that I claim the foregoing I have hereunto subscribedmy name this 26th day of Feb, 1918.

JOHN F. OOONNOR.

Copies of this patent may be obtained for fivecents eaoh, 1qy addressing the .flommissioner of Patents,

Washington, D. G. 

